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From: Ben Greear <greearb@candelatech.com>
To: linux-kernel <linux-kernel@vger.kernel.org>
Subject: a faster way to gettimeofday?
Date: Tue, 05 Mar 2002 20:41:59 -0700	[thread overview]
Message-ID: <3C859007.50102@candelatech.com> (raw)

I have a program that I very often need to calculate the current
time, with milisecond accuracy.  I've been using gettimeofday(),
but gprof shows it's taking a significant (10% or so) amount of
time.  Is there a faster (and perhaps less portable?) way to get
the time information on x86?  My program runs as root, so should
have any permissions it needs to use some backdoor hack if that
helps!

Thanks,
Ben

-- 
Ben Greear <greearb@candelatech.com>       <Ben_Greear AT excite.com>
President of Candela Technologies Inc      http://www.candelatech.com
ScryMUD:  http://scry.wanfear.com     http://scry.wanfear.com/~greear



             reply	other threads:[~2002-03-06  3:42 UTC|newest]

Thread overview: 37+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2002-03-06  3:41 Ben Greear [this message]
2002-03-06  3:58 ` a faster way to gettimeofday? Davide Libenzi
2002-03-06  4:20   ` Ben Greear
2002-03-06  4:31     ` Davide Libenzi
2002-03-06  4:34       ` Davide Libenzi
2002-03-07 14:14       ` a faster way to gettimeofday? rdtsc strangeness Terje Eggestad
2002-03-07 14:41         ` Alan Cox
2002-03-07 15:43           ` Terje Eggestad
2002-03-07 16:17             ` Alan Cox
2002-03-07 18:32             ` H. Peter Anvin
2002-03-08  1:32               ` Jamie Lokier
2002-03-08  1:35                 ` H. Peter Anvin
2002-03-08  1:57                   ` Jamie Lokier
2002-03-08 18:30                     ` gettimeofday() system call timing curiosity Jamie Lokier
2002-03-08 18:50                       ` H. Peter Anvin
2002-03-08 20:16                         ` Jamie Lokier
2002-03-08 20:30                           ` Davide Libenzi
2002-03-08 18:54                       ` Richard B. Johnson
2002-03-08 19:06                         ` johan.adolfsson
2002-03-08 19:16                           ` H. Peter Anvin
2002-03-08 19:45                           ` Richard B. Johnson
2002-03-08 20:29                             ` johan.adolfsson
2002-03-08 20:43                             ` Alan Cox
2002-03-09  3:03                               ` pjd
2002-03-09 18:51                                 ` Alan Cox
2002-03-09  3:15                             ` Kelsey Hudson
2002-03-08 19:19                         ` Alan Cox
2002-03-08 20:40                         ` george anzinger
2002-03-06 20:45     ` a faster way to gettimeofday? dean gaudet
2002-03-06 21:31       ` Chris Ball
2002-03-06 22:25         ` george anzinger
2002-03-07  0:04         ` vsyscalls Mark Mielke
2002-03-06 16:16 ` a faster way to gettimeofday? Chris Friesen
2002-03-06 16:54   ` Richard B. Johnson
2002-03-11 22:47 ` OBATA Noboru
2002-03-12 13:06   ` Jamie Lokier
2002-03-12 15:12     ` OBATA Noboru

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